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04-13-2008, 07:16 PM
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#1 |
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Registered User
Join Date: Feb 2006
Location: Smyrna, Ga
Posts: 1,647
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Vacuum Advance Diaphragm Question
I have been having some drivability problems for awhile with my '69.
narrowed the issue down to the dizzy. i am questioning the vacuum advance so i removed it from the truck. the question is....shouldn't the diaphragm move when i suck on the vacuum port. when i do i here air sucking through the diaphragm body. |
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04-13-2008, 07:19 PM
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#2 |
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Chasin' the Dream
Join Date: Mar 2008
Location: Lost in the 70's
Posts: 200
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Re: Vacuum Advance Diaphragm Question
Replace it, its leaking. My .02
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04-13-2008, 07:22 PM
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#3 |
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Registered User
Join Date: Feb 2006
Location: Smyrna, Ga
Posts: 1,647
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Re: Vacuum Advance Diaphragm Question
thats what i thought. just wanted a second opinion before i trek to the store.
thanks |
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04-13-2008, 08:48 PM
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#4 |
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Senior Member
 
Join Date: Dec 2006
Location: Studio City, Calif.
Posts: 2,883
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Re: Vacuum Advance Diaphragm Question
And if you want to get better mileage,replace it with an adjustable one and follow the instructions (easy).
__________________
'69 GMC C2500 Custom Camper, 8 1/2' bed, New GM 350, NP 435 Close Ratio 4spd. Trans., 3.73 Dana-60 open.Camper and Trailer wiring, PS, PB, AC, tach , three gas tanks, stereo speakers, 2nd owner, Work-Truck supreme. |
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